Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Testing JavaScript
Search
Irfan Maulana
May 24, 2022
Programming
0
140
Testing JavaScript
Intro to JavaScript testing
Irfan Maulana
May 24, 2022
Tweet
Share
More Decks by Irfan Maulana
See All by Irfan Maulana
Panduan untuk mempublikasikan kode ke publik
mazipan
0
99
Mengukur dan meningkatkan performa website
mazipan
1
210
Membuat Website Zaman Sekarang
mazipan
0
490
Kinerja Web 101 - Edisi 2022
mazipan
1
440
Layout Repaint & The Lessons Learned
mazipan
0
400
Bagaimana implementasi mockup design
mazipan
0
470
Memulai karir sebagai web programmer
mazipan
0
720
Membuat laporan kecepatan web untuk blog
mazipan
0
510
Bongkar Dapur Webnya #PHPID-OL
mazipan
0
500
Other Decks in Programming
See All in Programming
Proxmoxをまとめて管理できるコンソール作ってみました
karugamo
1
410
TSConfigからTypeScriptの世界を覗く
planck16
2
1.3k
テスト分析入門/Test Analysis Tutorial
goyoki
12
2.7k
『Python → TypeScript』オンボーディング奮闘記
takumi_tatsuno
1
140
iOSアプリ開発もLLMで自動運転する
hiragram
6
2.2k
Efficiency and Rock 'n’ Roll (Really!)
hollycummins
0
600
當開發遇上包裝:AI 如何讓產品從想法變成商品
clonn
0
2.6k
DevTalks 25 - Create your own AI-infused Java apps with ease
kdubois
2
120
OpenNext + Hono on Cloudflare でイマドキWeb開発スタックを実現する
rokuosan
0
110
Interface vs Types ~型推論が過多推論~
hirokiomote
1
230
Passkeys for Java Developers
ynojima
0
190
REST API設計の実践 – ベストプラクティスとその落とし穴
kentaroutakeda
2
320
Featured
See All Featured
Understanding Cognitive Biases in Performance Measurement
bluesmoon
29
1.7k
Responsive Adventures: Dirty Tricks From The Dark Corners of Front-End
smashingmag
252
21k
Facilitating Awesome Meetings
lara
54
6.4k
The Cost Of JavaScript in 2023
addyosmani
49
8.1k
Practical Orchestrator
shlominoach
188
11k
Git: the NoSQL Database
bkeepers
PRO
430
65k
KATA
mclloyd
29
14k
No one is an island. Learnings from fostering a developers community.
thoeni
21
3.3k
Code Reviewing Like a Champion
maltzj
523
40k
Testing 201, or: Great Expectations
jmmastey
42
7.5k
Rails Girls Zürich Keynote
gr2m
94
13k
Intergalactic Javascript Robots from Outer Space
tanoku
271
27k
Transcript
Testing JavaScript By Irfan Maulana
Hi, I am Irfan Working at Tokopedia as Principal Engineer
for Web Platform Team. mazipan.space @Maz_Ipan
A process to verifying the correctness & validating the functional
features of the app being developed APPLICATION TESTING
Software Development Life Cycle
JAVASCRIPT APPLICATION Frontend Backend Handling UI functionality: web, apps, desktop
Handling business logic, data store connection A B We will focus on the Frontend for this session.
PERFORM APP TESTING MANUAL AUTOMATED
WHY DO WE NEED? Bugs are bad, and who gets
blamed? The developer. You know humans are bad at complex, repetitive tasks. Computers are very, very good at complex, repetitive tasks. A professional ships working code. Code that works. Code that is well tested.
Focused on input & output. Not interested about the things
happening inside. Involve testing of the internal structure, code, design & implementation. METHODOLOGIES BLACKBOX WHITEBOX
TESTING PROCESS 1. PLANNING 2. PREPARATION 3. EXECUTION 4. REPORTING
THE TESTING TYPES
PROVEN METHOD FOR TESTING APP
STATIC TEST To catch typos, errors, possible bugs as you
write the code. Tools: • ESLint + Prettier • CodeQL, Snyk, SonarQube
Very fast feedback Can not reproduce functional bugs faced by
users STATIC TEST: PRO & CONS We can mark it as mandatory Very beneficial in the development phase
UNIT TEST To verify that individual, isolated and smallest part
works as expected. Tools: • TestingLibrary.com
Fast feedback Need an extra effort to write UT UNIT
TEST: PRO & CONS Verify the correctness of the function Can not represent the bug when the unit integrated Can not represent real user interaction
INTEGRATION TEST To verify that several units work together in
harmony. Tools: • TestingLibrary.com
Verify most of user interactions Slower feedback than UT More
effort than UT INTEGRATION TEST: PRO & CONS Can not represent device variant Can not replicate using the real data
END-TO-END TEST A robot that behaves like a user to
click around the app and verify that it functions correctly. Tools: • Cypress • Nightwatch • TestCafe
Can use multiple device Very slow to executed Need the
biggest effort E2E TEST: PRO & CONS Can use real data Replicate real user
COMPARISON Static Test Unit Test Integration E2E Test 🚀 Speed
🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 ⏰ Development time 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 💰 Cost 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 😎 Confidence 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 Read more on https://kentcdodds.com/blog/static-vs-unit-vs-integration-vs-e2e-tests
BEST ROI https://twitter.com/kentcdodds/status/960723172591992832
DEMO TIME!
CHECK THE CODE https://github.com/mazipan/react-testing-workshop Prerequisites: • Node.js
ASK ME!
CREDITS: This presentation template was created by Slidesgo, including icons
by Flaticon, and infographics & images by Freepik and illustrations by Stories. THANK YOU Please keep this slide for attribution.